Thank you for the response.
I never knew about the rule with the 10% of the body mass but he is my first ball python so I am only book-smart). In the books I read it said to feed your ball python a prey as big as the biggest part of his body an my books so I followed that rule and it seemed to work.
But thank you for the tip.
the 10% rule applies to younger ball pythons. once your snake reaches small rats he should be able to eat those the rest of his life.